2

编辑我有 .xib 文件UIView。UIView包含一些元素和点击手势识别器。

AnnotationView它与插座相连。在AnnotationView，我正在捕捉点击事件，它工作正常。

然后我试图将此事件传递给我的父视图（ViewController），其中AnnotationView实例被创建并添加为子视图。但是我的委托方法没有被调用。我不知道，如何解决这个问题，也不知道是因为我使用的是 subview 还是我只是对委托做错了什么。

这是一些代码：

注释视图.h

#import <UIKit/UIKit.h>

@protocol protName <NSObject>

-(void) test;

@end

@interface AnnotationView : UIView

@property (strong, nonatomic) IBOutlet UIImageView *image;
@property (weak, nonatomic) IBOutlet UILabel *textLabel;
@property (weak, nonatomic) IBOutlet UILabel *accessoryLabel;
@property (strong, nonatomic) IBOutlet UITapGestureRecognizer *tapRecognizer;
@property (nonatomic, weak) id <protName> delegate;

-(IBAction)handleTap:(UITapGestureRecognizer *)tapRecognizer;
@end

注释视图.m

#import "AnnotationView.h"

@implementation AnnotationView


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"AnnotationView"
                                                             owner:self
                                                           options:nil];
        AnnotationView *_myView = [nibContents objectAtIndex:0];
        _myView.backgroundColor = [UIColor greenColor];
        [self addSubview: _myView];

    }
    return self;
 }

-(IBAction)handleTap:(UITapGestureRecognizer *)tapRecognizer{
    NSLog(@"tap tap");

    [self.delegate test]; //this delegate is nil
}

@end

视图控制器.h

#import <UIKit/UIKit.h>
#import "AnnotationView.h"

@interface ViewController : UIViewController <protName>
@property (nonatomic,retain) AnnotationView *annot;

-(void) test;

@end

视图控制器.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    _annot = [[AnnotationView alloc] initWithFrame:CGRectMake(100, 100, 212, 45)];
    _annot.textLabel.text = @"some text";
    _annot.delegate = self;
    [self.view addSubview:_annot];
}
-(void) viewWillAppear:(BOOL)animated{
    _annot.delegate = self;
}
-(void) test{
    NSLog(@"Delegate massage is received!");
}
@end
4

3 回答 3

1

Why not just do this:

@implementation ViewController

- (void)viewDidLoad
{
    CGRect frame = CGRectMake(100, 100, 212, 45)];
    NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"AnnotationView"
                                                         owner:nil
                                                       options:nil];
    for (id object in nibContents) {
        if ([object isKindOfClass:[AnnotationView class]]) {
            _annot = (AnnotationView *)object;
        }
    }        
    _annot.frame = frame;
    _annot.backgroundColor = [UIColor greenColor];
    _annot.textLabel.text = @"some text";
    _annot.delegate = self;
    [self.view addSubview:_annot];
}
于 2013-08-08T13:33:42.603 回答
1

如何正确使用委托！

在 SecondViewController.h 中：

   @protocol messageDelegate <NSObject>
    @optional
    -(void) test;
    @end
    @interface SecondViewController : NSString
    @property (nonatomic, assign) id <messageDelegate> delegate;
    @end

在 SecondViewController.m 中：

-(void)readyToSend
{
    [self.delegate test];

}

在 ViewController.h 中：

@interface ViewController : UIViewController<messageDelegate>
@end

在 ViewController.m 中：在

- (void)viewDidLoad {
SecondViewController *secondViewController = [[SecondViewController alloc] init];
secondViewController.delegate = self;
}
-(void) test{
NSLog(@"Delegate massage is received!");

}

希望它会有所帮助！

于 2013-08-08T13:12:40.610 回答
0

实现协议的是您的 viewController 而不是 AnnotationView。所以你可以移动它给：

@interface AnnotationView : UIView <protName>
于 2013-08-08T13:13:59.837 回答